CN118207378A - Low-cost high-efficiency smelting process of low-temperature austenitic high-manganese steel - Google Patents
Low-cost high-efficiency smelting process of low-temperature austenitic high-manganese steel Download PDFInfo
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- CN118207378A CN118207378A CN202410310682.XA CN202410310682A CN118207378A CN 118207378 A CN118207378 A CN 118207378A CN 202410310682 A CN202410310682 A CN 202410310682A CN 118207378 A CN118207378 A CN 118207378A
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- 238000000034 method Methods 0.000 title claims abstract description 61
- 230000008569 process Effects 0.000 title claims abstract description 46
- 229910000617 Mangalloy Inorganic materials 0.000 title claims abstract description 28
- 238000003723 Smelting Methods 0.000 title claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 42
- 239000010959 steel Substances 0.000 claims abstract description 42
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 238000009749 continuous casting Methods 0.000 claims abstract description 13
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 10
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004571 lime Substances 0.000 claims abstract description 10
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 9
- 239000000956 alloy Substances 0.000 claims abstract description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 8
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910000628 Ferrovanadium Inorganic materials 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 239000010949 copper Substances 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 claims abstract description 5
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims abstract description 5
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 229910052742 iron Inorganic materials 0.000 claims abstract description 4
- 238000009833 condensation Methods 0.000 claims abstract description 3
- 230000005494 condensation Effects 0.000 claims abstract description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 30
- 239000002893 slag Substances 0.000 claims description 22
- 229910052786 argon Inorganic materials 0.000 claims description 15
- 238000010079 rubber tapping Methods 0.000 claims description 15
- 238000007664 blowing Methods 0.000 claims description 9
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 8
- 238000007670 refining Methods 0.000 claims description 8
- 238000009489 vacuum treatment Methods 0.000 claims description 8
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000033764 rhythmic process Effects 0.000 claims description 2
- 239000011651 chromium Substances 0.000 abstract description 3
- 229910052804 chromium Inorganic materials 0.000 abstract description 2
- 238000005266 casting Methods 0.000 abstract 2
- 239000000843 powder Substances 0.000 abstract 1
- 238000009966 trimming Methods 0.000 abstract 1
- 239000011572 manganese Substances 0.000 description 5
- 229910052748 manganese Inorganic materials 0.000 description 4
- 238000005275 alloying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Treatment Of Steel In Its Molten State (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention relates to the technical field of smelting processes, and discloses a low-cost and high-efficiency smelting process of low-temperature austenitic high-manganese steel, which comprises the following process steps: the method comprises the steps of adding 50-100 Kg of metal manganese steel, 1Kg of aluminum block and 3Kg of lime, feeding molten steel into an LF furnace, heating, adding alloy, slagging, continuously trimming components, starting a ladle car to a scrap adding position after heating the molten steel, adding metal manganese, metal chromium, nickel plates, copper plates and ferrovanadium in batches, paying attention to the temperature of molten iron at any time, avoiding condensation, continuously casting by using special casting powder of Sidoberg high manganese steel, and cooling for more than 48 hours after continuous casting.
Description
Technical Field
The invention relates to the technical field of smelting processes, in particular to a low-cost high-efficiency smelting process of low-temperature austenitic high-manganese steel.
Background
The low-temperature austenitic high-manganese steel has extremely high requirements on low-temperature toughness of steel types because the application scene is an extremely low-temperature environment, so that good molten steel cleanliness is required to ensure the steel performance. Meanwhile, the high manganese steel has the characteristics of high alloy element content, large alloy amount to be added, easy oxidation of part of alloy elements and the like, brings great difficulty to the smelting process, and reduces the yield of the alloy elements.
Disclosure of Invention
(One) solving the technical problems
Aiming at the defects of the prior art, the invention provides a low-cost and high-efficiency smelting process of low-temperature austenitic high-manganese steel, which has the advantages of high alloy element yield, low cost and the like, and solves the problem of alloy element yield.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: a low-cost high-efficiency smelting process of low-temperature austenitic high-manganese steel comprises the following process steps of S1 converter working procedure: adding metal manganese, aluminum blocks and lime in the tapping process of the converter, and stirring by opening small argon so as to prevent the molten steel from turning over greatly;
Wherein, S1 converter process: adding 50-100 Kg of metal manganese steel, 1Kg of aluminum block steel and 3Kg of lime steel in the converter tapping process;
s2LF furnace refining procedure: after molten steel enters a station, the LF furnace determines clearance, so that the lower electrode can be ensured;
S3VD vacuum treatment process: argon is started when entering a station, and the argon blowing quantity is based on slight fluctuation of the liquid level and cannot be blown out;
S4, continuous casting process: the continuous casting uses special covering slag for the Sidoberg high manganese steel, and the cooling is carried out after the continuous casting for more than 48 hours.
Preferably, the S2LF furnace refining process uses low-B low-Ti premelting slag, and common premelting slag is not used, and molten steel enters the LF furnace in the sequence of heating, adding alloy, slagging and continuously fine-tuning components;
After the temperature of the molten steel is raised, a ladle car is started to a scrap steel adding position, manganese metal, chromium metal, nickel plate, copper plate and ferrovanadium are added in batches, the temperature change is noticed at any time, solidification is avoided, and component fine adjustment is carried out after white slag is made.
Preferably, the vacuum treatment process of the S3VD is controlled to have the vacuum degree below 0.5 torr and the vacuum maintaining time is more than 15min; carrying out soft argon blowing operation on molten steel before the molten steel is discharged, wherein the soft argon blowing time is more than or equal to 15min;
The molten iron temperature is noticed at all times, condensation is avoided, component fine adjustment is carried out after white slag is produced, the white slag holding time is more than or equal to 20min, and the LF furnace rhythm is controlled according to 180 min.
Preferably, 50-100 Kg/t of steel of manganese metal, 1Kg/t of steel of aluminum block and 3Kg/t of steel of lime are added in the tapping process of the converter. The tapping phosphorus is less than or equal to 0.008 percent, and the tapping temperature is more than or equal to 1610 ℃.
Preferably, the LF furnace section is controlled at 180 minutes. The white slag holding time is more than or equal to 20min; the S of the LF furnace is less than or equal to 0.002 percent, and the calcium wire is more than or equal to 2m/t steel and then is discharged.
(III) beneficial effects
Compared with the prior art, the invention provides a low-cost high-efficiency smelting process of low-temperature austenitic high-manganese steel, which has the following beneficial effects:
1. The invention provides a low-cost high-efficiency smelting process for low-temperature austenitic high-manganese steel, which aims at a smelting method for high-manganese steel with 22-25 weight percent of manganese content and comprises the process paths of converter-LF refining, VD vacuum treatment, continuous casting and the like.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
A low-cost high-efficiency smelting process of low-temperature austenitic high-manganese steel comprises the following chemical components in percentage by weight ：C＝0.35～0.55,Mn＝22.50～25.50,Si＝0.10～0.50,Cr＝3.00～4.00,P≤0.03,S≤0.01,N≤0.05,B≤0.0005,Sb≤0.003％,B≤0.0006％,[H]≤0.00012％;
The process comprises the following steps: converter-LF refining-VD vacuum treatment-continuous casting. S1 converter working procedure: adding metal manganese, aluminum blocks and lime in the tapping process of the converter, and stirring by opening small argon so as to prevent the molten steel from turning over greatly;
Wherein, S1 converter process: adding 50-100 Kg of metal manganese steel, 1Kg of aluminum block steel and 3Kg of lime steel in the converter tapping process;
s2LF furnace refining procedure: after molten steel enters a station, the LF furnace determines clearance, so that the lower electrode can be ensured;
Wherein, the S2LF furnace refining procedure uses low-B low-Ti premelting slag, and common premelting slag cannot be used. Molten steel enters an LF furnace and is subjected to heating, alloying, slag forming and continuous fine adjustment according to the sequence of components;
After the temperature of the molten steel is raised, a ladle car is started to a scrap steel adding position, and manganese metal, chromium metal, nickel plate, copper plate and ferrovanadium are added in batches, so that temperature change is noticed at any time, and solidification is avoided. Fine-tuning the components after white slag is produced;
S3VD vacuum treatment process: argon is started when entering a station, and the argon blowing quantity is based on slight fluctuation of the liquid level and cannot be blown out;
wherein, the vacuum treatment process of S3VD, the vacuum degree is controlled below 0.5 torr, the vacuum time is more than 15min; carrying out soft argon blowing operation on molten steel before the molten steel is discharged, wherein the soft argon blowing time is more than or equal to 15min;
Wherein, the metal manganese, the metal chromium, the nickel plate, the copper plate and the ferrovanadium pay attention to the temperature of molten iron at any time, so that the coagulation is avoided, the components are finely adjusted after white slag is produced, and the retention time of the white slag is more than or equal to 20min. The LF furnace playing is controlled according to 180 minutes;
s4, continuous casting process: continuous casting uses special covering slag for the Sidoberg high manganese steel, and cooling is performed on the steel after continuous casting for more than 48 hours;
further, 50-100 Kg of metal manganese steel, 1Kg of aluminum block steel and 3Kg of lime steel are added in the converter tapping process. The tapping phosphorus is less than or equal to 0.008 percent, and the tapping temperature is more than or equal to 1610 ℃.
Further, the LF furnace section was controlled at 180 minutes. The white slag holding time is more than or equal to 20min; the S of the LF furnace is less than or equal to 0.002 percent, and the calcium wire is more than or equal to 2m/t steel and then is discharged.
The invention provides a smelting method of high manganese steel with 22-25 weight percent of manganese content, which comprises the process paths of converter-LF refining, VD vacuum treatment, continuous casting and the like, wherein metal manganese is added in advance through a converter, and the LF is subjected to manganese alloying operation. The method has the advantages of high efficiency, low cost and wide application prospect.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A low-cost and high-efficiency smelting process of low-temperature austenitic high-manganese steel is characterized by comprising the following steps of: the method comprises the following process steps of S1 converter working procedures: adding metal manganese, aluminum blocks and lime in the tapping process of the converter, and stirring by opening small argon so as to prevent the molten steel from turning over greatly;
Wherein, S1 converter process: adding 50-100 Kg of metal manganese steel, 1Kg of aluminum block steel and 3Kg of lime steel in the converter tapping process;
s2LF furnace refining procedure: after molten steel enters a station, the LF furnace determines clearance, so that the lower electrode can be ensured;
S3VD vacuum treatment process: argon is started when entering a station, and the argon blowing quantity is based on slight fluctuation of the liquid level and cannot be blown out;
S4, continuous casting process: the continuous casting uses special covering slag for the Sidoberg high manganese steel, and the cooling is carried out after the continuous casting for more than 48 hours.
2. The low-cost and high-efficiency smelting process of low-temperature austenitic high-manganese steel according to claim 1, wherein the smelting process comprises the following steps of: the S2LF furnace refining process uses low-B low-Ti premelting slag, and common premelting slag is not used, and molten steel enters the LF furnace in the sequence of heating, adding alloy, slagging and continuously fine-tuning components;
After the temperature of the molten steel is raised, a ladle car is started to a scrap steel adding position, manganese metal, chromium metal, nickel plate, copper plate and ferrovanadium are added in batches, the temperature change is noticed at any time, solidification is avoided, and component fine adjustment is carried out after white slag is made.
3. The low-cost and high-efficiency smelting process of low-temperature austenitic high-manganese steel according to claim 2, wherein: the S3VD vacuum treatment process is characterized in that the vacuum degree is controlled to be below 0.5 torr, and the vacuum keeping time is more than 15 minutes; carrying out soft argon blowing operation on molten steel before the molten steel is discharged, wherein the soft argon blowing time is more than or equal to 15min;
The molten iron temperature is noticed at all times, condensation is avoided, component fine adjustment is carried out after white slag is produced, the white slag holding time is more than or equal to 20min, and the LF furnace rhythm is controlled according to 180 min.
4. The low-cost and high-efficiency smelting process of low-temperature austenitic high-manganese steel according to claim 1, wherein the smelting process comprises the following steps of: 50-100 Kg of metal manganese steel, 1Kg of aluminum block steel and 3Kg of lime steel are added in the converter tapping process. The tapping phosphorus is less than or equal to 0.008 percent, and the tapping temperature is more than or equal to 1610 ℃.
5. The low-cost and high-efficiency smelting process of low-temperature austenitic high-manganese steel according to claim 1, wherein the smelting process comprises the following steps of: the LF furnace section is controlled according to 180 minutes. The white slag holding time is more than or equal to 20min; the S of the LF furnace is less than or equal to 0.002 percent, and the calcium wire is more than or equal to 2m/t steel and then is discharged.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410310682.XA CN118207378A (en) | 2024-03-19 | 2024-03-19 | Low-cost high-efficiency smelting process of low-temperature austenitic high-manganese steel |
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| CN202410310682.XA CN118207378A (en) | 2024-03-19 | 2024-03-19 | Low-cost high-efficiency smelting process of low-temperature austenitic high-manganese steel |
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